U.S. government ends medical tests on chimpanzees

Chimpanzee at Taronga Zoo in Sydney, Australia.
(Image credit: Getty Images)

The final 50 chimpanzees used by the U.S. government for medical testing are being retired to a sanctuary, finishing a long process of phasing out their use as test subjects. The National Institutes of Health retired around 300 chimpanzees in 2013 after deciding that they were unnecessary; the group of 50 is the final batch to be sent to live out their lives at Louisiana's Chimp Haven.

Chimpanzees had formerly been considered useful for medical researchers because they're mankind's closest genetic relatives. However, scientists now have the ability to genetically modify other animals, like rats and mice, to make them better stand-ins for people, essentially rendering tests on chimpanzees increasingly unnecessary.

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Jeva Lange

Jeva Lange was the executive editor at TheWeek.com. She formerly served as The Week's deputy editor and culture critic. She is also a contributor to Screen Slate, and her writing has appeared in The New York Daily News, The Awl, Vice, and Gothamist, among other publications. Jeva lives in New York City. Follow her on Twitter.